DESCRIPTION

The SiC641 and SiC641A are high frequency integrated

power stage optimized for synchronous buck applications

to offer high current, high efficiency, and high power density

performance with very low shutdown current. Packaged in

Vishay’s proprietary 5 mm x 5 mm MLP package, SiC641

and SiC641A enable voltage regulator designs to deliver up

to 55 A continuous current per phase.

The internal power MOSFETs utilize Vishay’s latest

TrenchFET® technology that delivers industry benchmark

performance to significantly reduce switching and

conduction losses.

The SiC641 and SiC641A incorporate an advanced

MOSFET gate driver IC that features high current driving

capability, adaptive dead-time control, an integrated

bootstrap switch, and user selectable zero current detection

to improve light load efficiency. The driver is also compatible

with a wide range of PWM controllers, supports tri-state

PWM, and 5 V and 3.3 V PWM logic.

The device also supports PS4 mode to reduce power

consumption when the system is in standby state.

The SiC641 and SiC641A offer operating temperature

monitoring, protection features, and warning flags that

improve system monitoring and reliability.

APPLICATIONS

• Multi-phase VRDs for computing, graphics card and

memory

• Intel core processor power delivery

- VCORE, VGRAPHICS, VSYSTEM AGENT

- VCCGI

• Up to 16 V rail input DC/DC VR modules

FEATURES

• Highly efficient

- Thermally enhanced PowerPAK® MLP55-31L

package

- Vishay’s latest TrenchFET technology and low

side MOSFET with integrated Schottky diode

- Integrated, low impedance, bootstrap switch

- Power MOSFETs optimized for 12 V input stage

- Supports PS4 mode light load requirement with low

shutdown supply current (5 V, 3 μA)

- Zero current detection for improved light load efficiency

• Highly versatile

- 5 V and 3.3 V PWM logic with tri-state and hold-off timer

- 5 V DSBL#, ZCD_EN# logic with PS4 state support

- High frequency operation up to 2 MHz

• Robust and reliable

- Delivers in excess of 55 A continuous current, 70 A, peak

(10 ms) and 100 A, peak (10 μs)

- Over current protection

- Over temperature flag

- Over temperature protection

- Undervoltage lockout protection

- High side MOSFET short detection

• Effective monitoring and reporting

- Accurate temperature reporting

- Warnings and faults reporting flag

• Material categorization: for definitions of compliance

please see www.vishay.com/doc?99912